A router can learn about remote networks in one of two ways:
● Remote networks are manually entered into the route table using static routes.
● Remote routes are dynamically learned using a dynamic routing protocol.
Static routing provides some advantages over dynamic routing, including:
● Static routes are not advertised over the network, resulting in better security.
● Static routes use less bandwidth than dynamic routing protocols, as routers do not exchange routes.
● No CPU cycles are used to calculate and communicate routes.
● The path a static route uses to send data is known.
Static routing has the following disadvantages:
● Initial configuration and maintenance is time-consuming.
● Configuration can be error -prone, especially in large networks.
● Administrator intervention is required to maintain changing route information.
● Does not scale well with growing networks; maintenance becomes cumbersome.
● Requires complete knowledge of the whole network for proper implementation.
Adam, Paul (2014-07-12). All-in-One CCIE V5 Written Exam Guide (Kindle Locations 2637-2643). . Kindle Edition.